已知点A、B分别是椭圆 x 2 a 2 + y 2 b 2 =1(a>b>0) 长轴的左、右端点,点C是椭圆短轴的一个端点,且离心率e= 2 2 .三角形ABC的面积为 2 ,动直线l:y=kx+m与椭圆于M、N两点. (I)求椭圆的方程; (II)若椭圆上存在点P,满足 OM + ON =λ OP (O为坐标原点),求λ的取值范围; (III)在(II)的条件下,当 λ= 2 时,求△MNO面积.
【单选题】I hoped diligence could make up for lack of preparation. On weekend nights, when my American roommates were out on dates, I would stay in the library reading the I visited the writing tutor for every ...
【单选题】Please read the following paragaraph, and find out How the writer develops the paragraph? I hoped diligence could make up for lack of preparation. On weekend nights, when my American roommates were ou...